▎ 摘　　要

NOVELTY - Graphene core-shell structure manganese oxide-manganese ferrite nano-material comprises 0-40% nano graphene material, and manganese (II) oxide, manganese ferrite is in a molar ratio of 1:1-3. USE - The graphene core-shell structure manganese oxide-manganese ferrite nano-material is useful in lithium-ion battery anode material (claimed). ADVANTAGE - The graphene core-shell structure manganese oxide-manganese ferrite nano-material produces lithium-ion battery anode material with excellent electrical property, high retention rate, and high temperatures resistant. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: (1) preparing graphene core-shell structure MnO @ MnFe2O4 nano-material comprising (i) dispersing oxidized graphene in oil amine, to obtain oxidized graphene suspension, (ii) uniformly mixing manganese (II) acetylacetonate, and oxidized graphene suspension in an inert gas atmosphere, carrying out reaction at 160-265 degrees C for 0.5-3 hours, to obtain graphene, and manganese oxide complex, and (iii) cooling to 160 degrees C, adding iron (III) acetylacetonate to step (ii) obtained product, carrying out reaction at 240-300 degrees C for 0.5-3hours, separating the reaction product, drying, and grinding, to obtain the final product; (2) use ofgraphene core-shell structure manganese oxide-manganese ferrite nano-material in lithium-ion battery anode material; and (3) use method of graphene core-shell structure manganese oxide-manganese ferrite nano-material in lithium-ion battery anode material comprising uniformly mixing synthesized graphene core-shell structure MnO @ MnFe2O4 nano-material, and carbon black, uniformly mixing polyvinylidene fluoride, pulping, coating on copper foil.